Removable conduit-thread.



H. 5. WHITE.

REMOVABLE CONDUIT THREAD.

APPLICATION FILED AUG.13, 1910.

Patented Apr. 25,1916,

IIIED WIIMI REMOVABLE coupon-THREAD,

Application filed August 13, 1910.

My invention relates to a removable conduit-thread used particularly inconnection with outlet-box for holding the pipe-conduit in position.

In carrying out the invention I provide a nipple, which I thread at oneend to engage a jam nut and split its other end in such a manner as toform a plurality of fingers or jaws which spread slightly at the base,and thicken or curve at their free ends, so that when placed over theend of a pipe-conduit, and a tapered sleeve forced over them, they willfirmly grasp the pipe-conduit.

Other features of my invention, together with the structural detailsthereof, may be best understood from the accompanying drawing, and thesubjoined description thereof, in which I have illustrated and describedin one sheet of drawings an embodiment of the same in what I considerits best form.

In the drawing, Figure 1, is an end view of the device with a brokenpiece of pipeconduit in place, as seen from the finger or jaw ends. Fig.2, is an elevation of the same. Fig. 3, is an end view as seen from thethreaded end. Fig. 4, is a sectional view taken through the longitudinalaxis. Fig. 5, is an elevation of the threaded end fingered or jawednipple.

In these figures, A, represents the nipple, one end of which beingthreaded to receive a jam 'or lock nut 1, and the other end is split ordivided into a plurality of jaws D of which I have shown four, but anydesired number may be applied.

The jaws are expanded as shown at E, and may be thickened at their freeends, as

Specification of Letters Patent.

Patented Apr. 25, 1916.

Serial No. 577,127.

shown at F, Fig. 5 or curved, as shown in Fig. 1. Their inner faces orside edges may be roughened or serrated, to give them a bite, as alsoshown.

B is the end of the section of a pipe-con duit, which inserted into thespace between the jaws D, is firmly held by the latter when they arepressed firmly against it.

C is the sleeve, tapered on its interior, which is slipped over thenipple A, and presses the jaws D with more or less force against thepipe-conduit B, and thereby holds the latter firmly and the lock nut 1,above mentioned, maintains the hold of the jaws upon the conduit.

Having thus described my invention, and believing I have made a new andvaluable improvement in the art to which it pertains, what I claim asnew and desire to secure by Letters Patent is In combination with ametallic pipe-conduit for electric conductors, a nipple having athreaded portion and an expanded portion adapted to fit the outersurface of said pipe-conduit, said expanded portion formed into aplurality of jaws flaring outwardly at their ends and provided withinner curved surfaces in cross section forming longitudinal sharp edges;a sleeve having a flaring end an inner curved shouldered opposite endengaging the base of said expanded portion of the nipple, and a nut onsaid threaded end portion, adapted to hold said sleeve in position andto cause the sharp edges of said jaws to bite the outer surface of saidpipe-conduit.

In testimony that I claim the foregoing I have hereto set my hand this13th day of May, 1910, in the presence of two witnesses.

HOWARD JAMES WHITE.

Witnesses:

E. R. ENNIS, I. S. HILDENBRANDT.

tloptes or this patent may be obtained for five cents each, byaddressing the "Commissioner of Patents, Washington, D. '0.

